Total Bridges
27,743
Public highway bridges in Illinois
State profile · Near national median SD
Illinois bridge safety
Condition ratings, load ratings, and structural-deficiency data for every public highway bridge in Illinois — drawn straight from the FHWA National Bridge Inventory.
- 27,743
- Public bridges
- 41.2%
- Good condition
- 7.9%
- Poor condition
- 7.9%
- Structurally deficient
Good Condition
41.2%
11,426 bridges rated 7-9
-8.8pp vs 50% benchmark
Poor Condition
7.9%
2,186 bridges rated 0-4
Structurally Deficient
7.9%
2,186 bridges flagged for repair priority
0.9pp vs national avg 7.0%
Illinois vs national bridge condition
Illinois — Good condition share 41.2%
National avg
Share of bridges rated 7-9 on the FHWA 0-9 scale (deck, superstructure, substructure all good).
Illinois — Structurally deficient share 26.3%
National avg
Lower is better. Bar maxes at 30% (worst-state ceiling). National average sits at 7.0%.
Condition Distribution
Bridge inventory deck-condition mix — Illinois (FHWA NBI)
Counties (102)
Adams 325 Alexander 96 Bond 165 Boone 111 Brown 71 Bureau 382 Calhoun 81 Carroll 185 Cass 77 Champaign 743 Christian 323 Clark 232 Clay 171 Clinton 187 Coles 308 Cook 2185 Crawford 196 Cumberland 169 De Witt 197 DeKalb 264 Douglas 234 DuPage 380 Edgar 278 Edwards 79 Effingham 260 Fayette 356 Ford 300 Franklin 323 Fulton 210 Gallatin 82 Greene 166 Grundy 269 Hamilton 164 Hancock 291 Hardin 58 Henderson 144 Henry 331 Iroquois 565 Jackson 235 Jasper 180 Jefferson 270 Jersey 111 Jo Daviess 198 Johnson 120 Kane 354 Kankakee 352 Kendall 133 Knox 321 LaSalle 529 Lake 286 Lawrence 183 Lee 372 Livingston 578 Logan 296 Macon 368 Macoupin 248 Madison 543 Marion 301 Marshall 153 Mason 85 Massac 138 McDonough 210 McHenry 229 McLean 624 Menard 90 Mercer 162 Monroe 130 Montgomery 261 Morgan 241 Moultrie 171 Ogle 377 Peoria 365 Perry 139 Piatt 249 Pike 338 Pope 86 Pulaski 106 Putnam 50 Randolph 155 Richland 147 Rock Island 256 Saline 176 Sangamon 480 Schuyler 121 Scott 96 Shelby 330 St. Clair 502 Stark 89 Stephenson 332 Tazewell 361 Union 192 Vermilion 515 Wabash 88 Warren 202 Washington 232 Wayne 264 White 210 Whiteside 280 Will 674 Williamson 204 Winnebago 475 Woodford 222
Illinois vs nearby ranks
Adjacent states on the structurally deficient leaderboard (lower share = better)
States are ranked by share of bridges flagged structurally deficient — the FHWA classification for any span where deck, superstructure, or substructure carries a condition rating of 4 or below. Lower percentages indicate stronger maintenance funding and inspection follow-through. States here sit immediately above and below Illinois on the same metric.
44
Rhode Island
7.69% top marginal rate
31
Nebraska
7.73% top marginal rate
17
Illinois
7.88% top marginal rate
25
Massachusetts
7.96% top marginal rate
29
Missouri
8.53% top marginal rate
Bridges Needing Most Attention in Illinois
Six lowest-condition bridges in Illinois, ranked by composite NBI rating. Each is inspected at least every 24 months.
FAS 1599
PoorOver: DRAINAGE CANAL
2.2 MI E MEYER, Adams, IL
Built 1980 Load: 0.6 t ADT: 200
CH 15
PoorOver: E FK MAZONRIVER
0.05 MI W CH 16, Grundy, IL
Built 1977 Load: 1.0 t ADT: 1,400
MOOSE RD - TR 240
Structurally DeficientOver: WILSON CREEK
NE-35-T3NR2E, Fulton, IL
Built 1935 Load: 1.3 t ADT: 10
TR 10-B
Structurally DeficientOver: KING CREEK
W EDGE OF MINERAL, Bureau, IL
Built 1899 Load: 1.6 t ADT: 10
TR-6
Structurally DeficientOver: DRAINAGE DITCH
3.5 MI NE DIETERICH, Effingham, IL
Built 1909 Load: 1.6 t ADT: 25
TR208K(TWIN BRIDGE
Structurally DeficientOver: BIG CREEK
NE EDGE MT ZION, Macon, IL
Built 1967 Load: 1.9 t ADT: 375
All Bridges in Illinois
IL 255 NB - FAP 31
UnknownOver: IL 111/IL 267
at GODFREY, Madison, IL
Built 2012 ADT: 8,000
IL 255 SB - FAP 31
UnknownOver: IL 111/IL 267
at GODFREY, Madison, IL
Built 2012 ADT: 8,000
US 67 NB
UnknownOver: IL 255 NB & SB
at GODFREY, Madison, IL
Built 2012 ADT: 6,500
IL 162
UnknownOver: FAI 55/70
W. OF TROY, Madison, IL
Built 2012 ADT: 46,100
ALBY ST/ FAU 8988
UnknownOver: US ROUTE 67
S BELTLINE ALTON, Madison, IL
Built 1961 ADT: 9,600
ELM ST./ FAU 8989
UnknownOver: US ROUTE 67
ALTON-W OF CENTRAL A, Madison, IL
Built 1946 ADT: 11,600
ALTON PEDESTRIAN
UnknownOver: LANDMARKS BLVD
0.11 W HENRY ST, Madison, IL
Built 2010 ADT: 16,000
Pontoon Road
UnknownOver: IL Rte 203
2.5 miles S of I-270, Madison, IL
Built 2010 ADT: 13,900
UPRR(KCSRR) spur
UnknownOver: IL 3 (Broadway)
NE OF MCKINLEY BR, Madison, IL
Built 1969 ADT: 8,200
UPRR(KCSRR) Mainli
UnknownOver: IL 3 (Broadway)
NE OF MCKINLEY BR, Madison, IL
Built 1969 ADT: 8,200
UPRR(KCSRR) Mainli
UnknownOver: IL 3 (Broadway)
NE OF MCKINLEY BR, Madison, IL
Built 1969 ADT: 8,200
N&W RR 2-MAINLINE
UnknownOver: IL 3/Broadway/Venice
NE OF MCKINLEY BR, Madison, IL
Built 1969 ADT: 8,200
ITRR
UnknownOver: FAP594/IL203
SO OF MADISON, Madison, IL
Built 1935 ADT: 13,000
CONRAIL
UnknownOver: IL 143
1 MI E OF WANDA, Madison, IL
Built 1937 ADT: 10,500
ILL TERM RR
UnknownOver: FAU 8885 SIU N ENT.
.25 S ILL 143, Madison, IL
Built 1969 ADT: 5,550
TRRA RR
UnknownOver: ILL 3
.25 N ST CLAIR CO L, Madison, IL
Built 1919 ADT: 4,500
CONRAIL
UnknownOver: CH 1
0.05 MI E OF WANDA, Madison, IL
Built 1900 ADT: 1,400
CONRAIL
UnknownOver: FAS 772
E OF COLLINSVILLE, Madison, IL
Built 1900 ADT: 950
MISSOURI PACIFIC
UnknownOver: CH 51
0.5 MI SW OF WORDEN, Madison, IL
Built 1952 ADT: 1,300
UNION PACIFIC RR
UnknownOver: CH 19 WANDA ROAD
1MI SOUTH OF WANDA, Madison, IL
Built 1998 ADT: 1,350
MISSOURI PACIFIC
UnknownOver: TR 121A
1.0 MI S WORDEN, Madison, IL
Built 1952 ADT: 50
IT RR
UnknownOver: TR 146D
E. OF ENT. TO S.I.U., Madison, IL
Built 1900 ADT: 75
CONRAIL
UnknownOver: TR 194
2 MI E COLLINSVILLE, Madison, IL
Built 1900 ADT: 400
CONRAIL
UnknownOver: TR 202
3.25 MI E COLLINSVIL, Madison, IL
Built 1900 ADT: 100
CONRAIL
UnknownOver: TR 230
2.0 MI S TROY, Madison, IL
Built 1900 ADT: 300
MO PAC RR
UnknownOver: TR 246
S OF WORDEN, Madison, IL
Built 1952 ADT: 300
CONRAIL
UnknownOver: TR 363
3.5 MI E COLLINSVILL, Madison, IL
Built 1900 ADT: 150
CONRAIL
UnknownOver: TR 387A
E OF COLLINSVILLE, Madison, IL
Built 1900 ADT: 275
GM&O RR
UnknownOver: SEMINARY ST FAU 8998
0.08 M S OF BELTLINE, Madison, IL
Built 1938 ADT: 4,950
TRRA RAILROADS
UnknownOver: ILL RTE 3
0.72 M N MC KINLEY B, Madison, IL
Built 1901 ADT: 12,000
TRRA RAILROADS
UnknownOver: KLEIN AVE FAU 9106
0.9 MI E MERCHANT BR, Madison, IL
Built 1901 ADT: 3,200
CMW RR
UnknownOver: W St Louis Ave
0.3mi E of IL 3, Madison, IL
Built 1988 ADT: 13,600
KINOKA RD (FAS 271
UnknownOver: FAI-57
KINMUNDY INT, Marion, IL
Built 1968 ADT: 18,100
IL 161 - FAP 805
UnknownOver: FAI-57
8 mi E of Centralia, Marion, IL
Built 1968 ADT: 19,300
PERRY LANE (FAS178
UnknownOver: FAI-57
4 MI S KINMUNDY INT, Marion, IL
Built 1968 ADT: 16,700
BOONE ST RD (TR 19
UnknownOver: FAI-57
1 MI N SALEM INT, Marion, IL
Built 1968 ADT: 16,700
WALNUT HILL RD(CH3
UnknownOver: FAI-57
MAR-JEFF CO LINE, Marion, IL
Built 1966 ADT: 25,000
NATION RD (CH 36)
UnknownOver: FAI-57
3.5 MI S SALEM INT, Marion, IL
Built 1968 ADT: 19,300
CH-20 TONTI RD
UnknownOver: FAI-57
2.75 MI N SALEM INT, Marion, IL
Built 1967 ADT: 16,700
TOWNHOUSE RD(TR 15
UnknownOver: FAI-57
4.75 MI N SALEM INT, Marion, IL
Built 1968 ADT: 16,700
CROSS ROAD (TR-249
UnknownOver: FAI-57
1.5 MI S SALEM INT, Marion, IL
Built 1968 ADT: 19,300
LEVEE ROAD (TR 341
UnknownOver: FAI-57
2 MI N ILL 161 INT, Marion, IL
Built 1968 ADT: 19,300
KELL ROAD (TR 435)
UnknownOver: FAI-57
2 MI S ILL 161 INT, Marion, IL
Built 1966 ADT: 25,000
FAI-57 NB
UnknownOver: US 50 (FAP-99)
SALEM INT, Marion, IL
Built 1968 ADT: 13,700
FAI-57 SB
UnknownOver: US-50
SALEM INT, Marion, IL
Built 1968 ADT: 14,900
OAK GROVE RD (CH 1
UnknownOver: FAI-57
3 MI S PATOKA INT, Marion, IL
Built 1968 ADT: 16,700
ROBB ROAD (TR 45)
UnknownOver: FAI-57
2 MI N PATOKA INT, Marion, IL
Built 1969 ADT: 18,100
ST PETER RD(FAS279
UnknownOver: FAI-57
2.75 MI S FAYETTE CL, Marion, IL
Built 1969 ADT: 18,100
BLOMBERG RD (TR396
UnknownOver: FAI-57
1.5 MI S FAYETTE C L, Marion, IL
Built 1969 ADT: 18,100
IL 161WB (McCord S
UnknownOver: 3 streets,BNSFRR,ATK,ICR
Centralia, Marion, IL
Built 1986 ADT: 1,775
Showing 2,751-2,800 of 27,743 bridges
Data sourced from the FHWA National Bridge Inventory (NBI), latest released cycle. See our methodology for details. Retrieved and formatted by PlainBridges Editorial.
Disclaimer: This information is provided for informational purposes only and does not constitute professional advice. Data is sourced from the FHWA National Bridge Inventory (NBI). A "structurally deficient" rating is a repair-priority signal, not a closure or unsafe-to-cross designation. Consult a qualified civil engineer before making decisions based on this data.
Understanding Bridge Conditions
How FHWA rates bridge condition on a 0-9 scale.
Check Your Daily Bridges
How to look up bridge condition data for bridges on your route.
Read our methodology — how this data is sourced, computed, and verified.
| Publisher | Kiznis Studio |
| Sources | FHWA National Bridge Inventory, public U.S. government datasets |